/*
 * jQuery Media Plugin for converting elements into rich media content.
 *
 * Examples and documentation at: http://malsup.com/jquery/media/
 * Copyright (c) 2007-2010 M. Alsup
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 * @author: M. Alsup
 * @version: 0.97 (20-MAY-2011)
 * @requires jQuery v1.1.2 or later
 * $Id: jquery.media.js 2460 2007-07-23 02:53:15Z malsup $
 *
 * Supported Media Players:
 *	- Flash
 *	- Quicktime
 *	- Real Player
 *	- Silverlight
 *	- Windows Media Player
 *	- iframe
 *
 * Supported Media Formats:
 *	 Any types supported by the above players, such as:
 *	 Video: asf, avi, flv, mov, mpg, mpeg, mp4, qt, smil, swf, wmv, 3g2, 3gp
 *	 Audio: aif, aac, au, gsm, mid, midi, mov, mp3, m4a, snd, rm, wav, wma
 *	 Other: bmp, html, pdf, psd, qif, qtif, qti, tif, tiff, xaml
 *
 * Thanks to Mark Hicken and Brent Pedersen for helping me debug this on the Mac!
 * Thanks to Dan Rossi for numerous bug reports and code bits!
 * Thanks to Skye Giordano for several great suggestions!
 * Thanks to Richard Connamacher for excellent improvements to the non-IE behavior!
 */
;
(function($) {

	var lameIE = $.browser.msie && $.browser.version < 9;

	/**
	 * Chainable method for converting elements into rich media.
	 * 
	 * @param options
	 * @param callback
	 *            fn invoked for each matched element before conversion
	 * @param callback
	 *            fn invoked for each matched element after conversion
	 */
	$.fn.media = function(options, f1, f2) {
		if (options == 'undo') {
			return this.each(function() {
				var $this = $(this);
				var html = $this.data('media.origHTML');
				if (html)
					$this.replaceWith(html);
			});
		}

		return this
				.each(function() {
					if (typeof options == 'function') {
						f2 = f1;
						f1 = options;
						options = {};
					}
					var o = getSettings(this, options);
					// pre-conversion callback, passes original element and
					// fully populated options
					if (typeof f1 == 'function')
						f1(this, o);

					var r = getTypesRegExp();
					var m = r.exec(o.src.toLowerCase()) || [ '' ];

					o.type ? m[0] = o.type : m.shift();
					for (var i = 0; i < m.length; i++) {
						fn = m[i].toLowerCase();
						if (isDigit(fn[0]))
							fn = 'fn' + fn; // fns can't begin with numbers
						if (!$.fn.media[fn])
							continue; // unrecognized media type
						// normalize autoplay settings
						var player = $.fn.media[fn + '_player'];
						if (!o.params)
							o.params = {};
						if (player) {
							var num = player.autoplayAttr == 'autostart';
							o.params[player.autoplayAttr || 'autoplay'] = num ? (o.autoplay ? 1
									: 0)
									: o.autoplay ? true : false;
						}
						var $div = $.fn.media[fn](this, o);

						$div.css('backgroundColor', o.bgColor).width(o.width);

						if (o.canUndo) {
							var $temp = $('<div></div>').append(this);
							$div.data('media.origHTML', $temp.html()); // store
																		// original
																		// markup
						}

						// post-conversion callback, passes original element,
						// new div element and fully populated options
						if (typeof f2 == 'function')
							f2(this, $div[0], o, player.name);
						break;
					}
				});
	};

	/**
	 * Non-chainable method for adding or changing file format / player mapping
	 * 
	 * @name mapFormat
	 * @param String
	 *            format File format extension (ie: mov, wav, mp3)
	 * @param String
	 *            player Player name to use for the format (one of: flash,
	 *            quicktime, realplayer, winmedia, silverlight or iframe
	 */
	$.fn.media.mapFormat = function(format, player) {
		if (!format || !player || !$.fn.media.defaults.players[player])
			return; // invalid
		format = format.toLowerCase();
		if (isDigit(format[0]))
			format = 'fn' + format;
		$.fn.media[format] = $.fn.media[player];
		$.fn.media[format + '_player'] = $.fn.media.defaults.players[player];
	};

	// global defautls; override as needed
	$.fn.media.defaults = {
		standards : true, // use object tags only (no embeds for non-IE
							// browsers)
		canUndo : true, // tells plugin to store the original markup so it can
						// be reverted via: $(sel).mediaUndo()
		width : 400,
		height : 400,
		autoplay : 0, // normalized cross-player setting
		bgColor : 'black', // background color
		params : {
			wmode : 'transparent'
		}, // added to object element as param elements; added to embed element
			// as attrs
		attrs : {}, // added to object and embed elements as attrs
		flvKeyName : 'file', // key used for object src param (thanks to
								// Andrea Ercolino)
		flashvars : {
			autostart : true
		}, // added to flash content as flashvars param/attr
		flashVersion : '7', // required flash version
		expressInstaller : null, // src for express installer

		// default flash video and mp3 player (@see:
		// http://jeroenwijering.com/?item=Flash_Media_Player)
		flvPlayer : 'mediaplayer.swf',
		mp3Player : 'mediaplayer.swf',

		// @see http://msdn2.microsoft.com/en-us/library/bb412401.aspx
		silverlight : {
			inplaceInstallPrompt : 'true', // display in-place install prompt?
			isWindowless : 'true', // windowless mode (false for wrapping
									// markup)
			framerate : '24', // maximum framerate
			version : '0.9', // Silverlight version
			onError : null, // onError callback
			onLoad : null, // onLoad callback
			initParams : null, // object init params
			userContext : null
		// callback arg passed to the load callback
		}
	};

	// Media Players; think twice before overriding
	$.fn.media.defaults.players = {
		flash : {
			name : 'flash',
			title : 'Flash',
			types : 'flv,mp3,swf',
			mimetype : 'application/x-shockwave-flash',
			pluginspage : 'http://www.adobe.com/go/getflashplayer',
			ieAttrs : {
				classid : 'clsid:d27cdb6e-ae6d-11cf-96b8-444553540000',
				type : 'application/x-oleobject',
				codebase : 'http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version='
						+ $.fn.media.defaults.flashVersion
			}
		},
		quicktime : {
			name : 'quicktime',
			title : 'QuickTime',
			mimetype : 'video/quicktime',
			pluginspage : 'http://www.apple.com/quicktime/download/',
			types : 'aif,aiff,aac,au,bmp,gsm,mov,mid,midi,mpg,mpeg,mp4,m4a,psd,qt,qtif,qif,qti,snd,tif,tiff,wav,3g2,3gp',
			ieAttrs : {
				classid : 'clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B',
				codebase : 'http://www.apple.com/qtactivex/qtplugin.cab'
			}
		},
		realplayer : {
			name : 'real',
			title : 'RealPlayer',
			types : 'ra,ram,rm,rpm,rv,smi,smil',
			mimetype : 'audio/x-pn-realaudio-plugin',
			pluginspage : 'http://www.real.com/player/',
			autoplayAttr : 'autostart',
			ieAttrs : {
				classid : 'clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA'
			}
		},
		winmedia : {
			name : 'winmedia',
			title : 'Windows Media',
			types : 'asx,asf,avi,wma,wmv',
			mimetype : $.browser.mozilla && isFirefoxWMPPluginInstalled() ? 'application/x-ms-wmp'
					: 'application/x-mplayer2',
			pluginspage : 'http://www.microsoft.com/Windows/MediaPlayer/',
			autoplayAttr : 'autostart',
			oUrl : 'url',
			ieAttrs : {
				classid : 'clsid:6BF52A52-394A-11d3-B153-00C04F79FAA6',
				type : 'application/x-oleobject'
			}
		},
		// special cases
		img : {
			name : 'img',
			title : 'Image',
			types : 'gif,png,jpg'
		},
		iframe : {
			name : 'iframe',
			types : 'html,pdf'
		},
		silverlight : {
			name : 'silverlight',
			types : 'xaml'
		}
	};

	//
	// everything below here is private
	//

	// detection script for FF WMP plugin
	// (http://www.therossman.org/experiments/wmp_play.html)
	// (hat tip to Mark Ross for this script)
	function isFirefoxWMPPluginInstalled() {
		var plugs = navigator.plugins;
		for (var i = 0; i < plugs.length; i++) {
			var plugin = plugs[i];
			if (plugin['filename'] == 'np-mswmp.dll')
				return true;
		}
		return false;
	}

	var counter = 1;

	for ( var player in $.fn.media.defaults.players) {
		var types = $.fn.media.defaults.players[player].types;
		$.each(types.split(','), function(i, o) {
			if (isDigit(o[0]))
				o = 'fn' + o;
			$.fn.media[o] = $.fn.media[player] = getGenerator(player);
			$.fn.media[o + '_player'] = $.fn.media.defaults.players[player];
		});
	}
	;

	function getTypesRegExp() {
		var types = '';
		for ( var player in $.fn.media.defaults.players) {
			if (types.length)
				types += ',';
			types += $.fn.media.defaults.players[player].types;
		}
		;
		return new RegExp('\\.(' + types.replace(/,/ig, '|') + ')\\b');
	}
	;

	function getGenerator(player) {
		return function(el, options) {
			return generate(el, options, player);
		};
	}
	;

	function isDigit(c) {
		return '0123456789'.indexOf(c) > -1;
	}
	;

	// flatten all possible options: global defaults, meta, option obj
	function getSettings(el, options) {
		options = options || {};
		var $el = $(el);
		var cls = el.className || '';
		// support metadata plugin (v1.0 and v2.0)
		var meta = $.metadata ? $el.metadata() : $.meta ? $el.data() : {};
		meta = meta || {};
		var w = meta.width
				|| parseInt(((cls.match(/\bw:(\d+)/) || [])[1] || 0))
				|| parseInt(((cls.match(/\bwidth:(\d+)/) || [])[1] || 0));
		var h = meta.height
				|| parseInt(((cls.match(/\bh:(\d+)/) || [])[1] || 0))
				|| parseInt(((cls.match(/\bheight:(\d+)/) || [])[1] || 0))

		if (w)
			meta.width = w;
		if (h)
			meta.height = h;
		if (cls)
			meta.cls = cls;

		// crank html5 style data attributes
		var dataName = 'data-';
		for (var i = 0; i < el.attributes.length; i++) {
			var a = el.attributes[i], n = $.trim(a.name);
			var index = n.indexOf(dataName);
			if (index === 0) {
				n = n.substring(dataName.length);
				meta[n] = a.value;
			}
		}

		var a = $.fn.media.defaults;
		var b = options;
		var c = meta;

		var p = {
			params : {
				bgColor : options.bgColor || $.fn.media.defaults.bgColor
			}
		};
		var opts = $.extend({}, a, b, c);
		$.each([ 'attrs', 'params', 'flashvars', 'silverlight' ],
				function(i, o) {
					opts[o] = $.extend({}, p[o] || {}, a[o] || {}, b[o] || {},
							c[o] || {});
				});

		if (typeof opts.caption == 'undefined')
			opts.caption = $el.text();

		// make sure we have a source!
		opts.src = opts.src || $el.attr('href') || $el.attr('src') || 'unknown';
		return opts;
	}
	;

	//
	// Flash Player
	//

	// generate flash using SWFObject library if possible
	$.fn.media.swf = function(el, opts) {
		if (!window.SWFObject && !window.swfobject) {
			// roll our own
			if (opts.flashvars) {
				var a = [];
				for ( var f in opts.flashvars)
					a.push(f + '=' + opts.flashvars[f]);
				if (!opts.params)
					opts.params = {};
				opts.params.flashvars = a.join('&');
			}
			return generate(el, opts, 'flash');
		}

		var id = el.id ? (' id="' + el.id + '"') : '';
		var cls = opts.cls ? (' class="' + opts.cls + '"') : '';
		var $div = $('<div' + id + cls + '>');

		// swfobject v2+
		if (window.swfobject) {
			$(el).after($div).appendTo($div);
			if (!el.id)
				el.id = 'movie_player_' + counter++;

			// replace el with swfobject content
			swfobject.embedSWF(opts.src, el.id, opts.width, opts.height,
					opts.flashVersion, opts.expressInstaller, opts.flashvars,
					opts.params, opts.attrs);
		}
		// swfobject < v2
		else {
			$(el).after($div).remove();
			var so = new SWFObject(opts.src, 'movie_player_' + counter++,
					opts.width, opts.height, opts.flashVersion, opts.bgColor);
			if (opts.expressInstaller)
				so.useExpressInstall(opts.expressInstaller);

			for ( var p in opts.params)
				if (p != 'bgColor')
					so.addParam(p, opts.params[p]);
			for ( var f in opts.flashvars)
				so.addVariable(f, opts.flashvars[f]);
			so.write($div[0]);
		}

		if (opts.caption)
			$('<div>').appendTo($div).html(opts.caption);
		return $div;
	};

	// map flv and mp3 files to the swf player by default
	$.fn.media.flv = $.fn.media.mp3 = function(el, opts) {
		var src = opts.src;
		var player = /\.mp3\b/i.test(src) ? opts.mp3Player : opts.flvPlayer;
		var key = opts.flvKeyName;
		src = encodeURIComponent(src);
		opts.src = player;
		opts.src = opts.src + '?' + key + '=' + (src);
		var srcObj = {};
		srcObj[key] = src;
		opts.flashvars = $.extend({}, srcObj, opts.flashvars);
		return $.fn.media.swf(el, opts);
	};

	//
	// Silverlight
	//
	$.fn.media.xaml = function(el, opts) {
		if (!window.Sys || !window.Sys.Silverlight) {
			if ($.fn.media.xaml.warning)
				return;
			$.fn.media.xaml.warning = 1;
			alert('You must include the Silverlight.js script.');
			return;
		}

		var props = {
			width : opts.width,
			height : opts.height,
			background : opts.bgColor,
			inplaceInstallPrompt : opts.silverlight.inplaceInstallPrompt,
			isWindowless : opts.silverlight.isWindowless,
			framerate : opts.silverlight.framerate,
			version : opts.silverlight.version
		};
		var events = {
			onError : opts.silverlight.onError,
			onLoad : opts.silverlight.onLoad
		};

		var id1 = el.id ? (' id="' + el.id + '"') : '';
		var id2 = opts.id || 'AG' + counter++;
		// convert element to div
		var cls = opts.cls ? (' class="' + opts.cls + '"') : '';
		var $div = $('<div' + id1 + cls + '>');
		$(el).after($div).remove();

		Sys.Silverlight.createObjectEx({
			source : opts.src,
			initParams : opts.silverlight.initParams,
			userContext : opts.silverlight.userContext,
			id : id2,
			parentElement : $div[0],
			properties : props,
			events : events
		});

		if (opts.caption)
			$('<div>').appendTo($div).html(opts.caption);
		return $div;
	};

	//
	// generate object/embed markup
	//
	function generate(el, opts, player) {
		var $el = $(el);
		var o = $.fn.media.defaults.players[player];

		if (player == 'iframe') {
			o = $('<iframe' + ' width="' + opts.width + '" height="'
					+ opts.height + '" >');
			o.attr('src', opts.src);
			o.css('backgroundColor', o.bgColor);
		} else if (player == 'img') {
			o = $('<img>');
			o.attr('src', opts.src);
			opts.width && o.attr('width', opts.width);
			opts.height && o.attr('height', opts.height);
			o.css('backgroundColor', o.bgColor);
		} else if (lameIE) {
			var a = [ '<object width="' + opts.width + '" height="'
					+ opts.height + '" ' ];
			for ( var key in opts.attrs)
				a.push(key + '="' + opts.attrs[key] + '" ');
			for ( var key in o.ieAttrs || {}) {
				var v = o.ieAttrs[key];
				if (key == 'codebase' && window.location.protocol == 'https:')
					v = v.replace('http', 'https');
				a.push(key + '="' + v + '" ');
			}
			a.push('></ob' + 'ject' + '>');
			var p = [ '<param name="' + (o.oUrl || 'src') + '" value="'
					+ opts.src + '">' ];
			for ( var key in opts.params)
				p.push('<param name="' + key + '" value="' + opts.params[key]
						+ '">');
			p.push('<param name="allowscriptaccess" value="always"/>');
			p.push('<param name="allowfullscreen" value="true"/>');
			var o = document.createElement(a.join(''));
			for (var i = 0; i < p.length; i++)
				o.appendChild(document.createElement(p[i]));
		} else if (opts.standards) {
			// Rewritten to be standards compliant by Richard Connamacher
			var a = [ '<object type="' + o.mimetype + '" width="' + opts.width
					+ '" height="' + opts.height + '"' ];
			if (opts.src)
				a.push(' data="' + opts.src + '" ');
			if ($.browser.msie) {
				for ( var key in o.ieAttrs || {}) {
					var v = o.ieAttrs[key];
					if (key == 'codebase'
							&& window.location.protocol == 'https:')
						v = v.replace('http', 'https');
					a.push(key + '="' + v + '" ');
				}
			}
			a.push('>');
			a.push('<param name="' + (o.oUrl || 'src') + '" value="' + opts.src
					+ '">');
			for ( var key in opts.params) {
				if (key == 'wmode' && player != 'flash') // FF3/Quicktime
															// borks on wmode
					continue;
				a.push('<param name="' + key + '" value="' + opts.params[key]
						+ '">');
			}
			a.push('<param name="allowscriptaccess" value="always"/>');
			a.push('<param name="allowfullscreen" value="true"/>');
			// Alternate HTML
			a.push('<div><p><strong>' + o.title + ' Required</strong></p><p>'
					+ o.title + ' is required to view this media. <a href="'
					+ o.pluginspage + '">Download Here</a>.</p></div>');
			a.push('</ob' + 'ject' + '>');
		} else {
			var a = [ '<embed width="' + opts.width + '" height="'
					+ opts.height + '" style="display:block"' ];
			if (opts.src)
				a.push(' src="' + opts.src + '" ');
			for ( var key in opts.attrs)
				a.push(key + '="' + opts.attrs[key] + '" ');
			for ( var key in o.eAttrs || {})
				a.push(key + '="' + o.eAttrs[key] + '" ');
			for ( var key in opts.params) {
				if (key == 'wmode' && player != 'flash') // FF3/Quicktime
															// borks on wmode
					continue;
				a.push(key + '="' + opts.params[key] + '" ');
			}
			a.push('></em' + 'bed' + '>');
		}
		// convert element to div
		var id = el.id ? (' id="' + el.id + '"') : '';
		var cls = opts.cls ? (' class="' + opts.cls + '"') : '';
		var $div = $('<div' + id + cls + '>');
		$el.after($div).remove();
		(lameIE || player == 'iframe' || player == 'img') ? $div.append(o)
				: $div.html(a.join(''));
		if (opts.caption)
			$('<div>').appendTo($div).html(opts.caption);
		return $div;
	};

})(jQuery);